A cobpobatiokt of



V. WINQUIST.

RING GRINDING MACHINE.

APPLICATION FILED FEB. 10, I920.

1,402,700. Patented Jan. 3, 1922,

5 SHEETS-SHEET I.

I II :1 I l I":

:E INVENTOR.

A TTORNEY.

V. WINQUIST.

RING GRINDING MACHINE. APPLICATION FILED FEB.10,1920.

1 102,700, Patented Jan. 3, 1922.

5 SHEETS-SHEET 2.

Wag I NVENTOR. I W

A TTORNEY.

v. WINQUIST.

RING GRINDING MACHINE.

' Q APPLlCATlDN FILED FEB. 10, 1920. 1,402,700. 0 Patentw n- 3,1922.

{2 n "a SHEETS-SHEET 3.

W QVV TIOR.

ATTORNEY.

V. WINQUIST.

RING GRlNDING MACHiNE.

APPLICATION FILED FEB. 10 1920.

Patented Jan. 3, 1922.

' 5 SHEETS-SHEET 4- W/ INVENTOR.

ATTORNEY.

V.. WINQUIST.

RING GRINDING MACHINE.

APPLICATION. men FEB. 10. 1920.

1,402,700, Patented Jam 3,1922.

5 SHEETS-SHEET 5.

15 is mounted to reciprocate horizontally immediately below said part 14:, upon the surface 20. The stack of rings rests on the slide 15 when it is in its forward position shown in Fig. 3, and when the slide is retracted until the curved surface '16 reaches the point 17, the lowermost ring 18 will drop to the surface 15, in front of the slide. VJ hen the slide moves forward this ring 18 will be pushed along the slideway and delivered over the surface 19 into an incline chute defined in part by surface 21 and 22, Figs. 1 and 2 respectively, which guides the ring to a vertical position 23, which I have termed a pre-loading position.

The slide may be operated by any suitable mechanism, but I prefer this shall include a safety means for preventing brea rage of the mechanismin the event that the feed of a ring is blocked. The slide is reciprocated in the present instance from the shaft This shaft carries an eccentric 25 for reciprocating a link 26 which oscillates a bell-crank lcver'27 through the agency of links 28 and 29 and rod 31. The link 28 and rod 31 are connected to the link 29 by means of a ball and socket connection 32. The rod 81 is 'slidable through a part on the link 26,

ring am in front of the slide, upward travel of the joint 32 will be stopped, and the rod 31 will move downwardly through the part 33 against the pressure of spring This action will be repeated until the machine is stopped and the jam displaced.

From the position 23, the rin moves to loading station and thence between a pair of jaws, by means which willbedescribed hereinafter.

The jaws designated generally by characters 38 and 39 are relatively thin, of less thickness than a ring and are shaped to pcripherally enclose'the ring, as plainly shown. In the present case the jaws are of sectional construction, but rigidly and detachably secured respectively to parts 41 and 42 the former of which is loose on shaft 13 and the iatter fixed thereto. By removing the plates 4L4- the jaws 38 and 39 may be removed from the parts 41' and 2. The jaw 38 is constantly urged toward the jaw 39 by a spring 4-5 for the purpose of gripping or clamping an interposed ring; and a cam 16 carried by part 41 is employed for separating the jaws.

This cam, rotatably supported by part l1, has a flat surface 427, liigs. 2 and 8, which bears against an adjustable stop 48 carried by part 42, and is adapted to be oscillated by means of rod 49 pivotally attached at 51 to a stationary part and slidable at its outer end in an opening diametrically through the cam. The shaft 43 and consequently the jaws are oscillated to carry a ring into and out of grinding relation to the abrasive disks (described hereinafter), by means of a crank disk 52 fixed to the shaft 4:3, which disk derives its movement from the link Thus the ring feedingdevice and jaws are operated in timed relation. As shown in Figs. 2 and (l, the jaws have completed the said movement between the abrasive disks 53 and 54, and when the crank disk 52 is oscillated in a clockwise direction by downward movement of the link 26, the jaws will be likewise moved and, before leavingthe dotted line position shown in Fig. 2, caused to separate bv action of the cam The cam 4-6 is oscillated a number of degrees equal to the difference between the movement of the rod 49 and the jaw element 42, thus separalhx;- the jaws 38 and 39, as will be obvious. By adjustment f the screw 55, Fig. 2, the jaws may be accommodated to variations in ring diameters.

Attention is now directed more particularly to Figs. 1, 2 and 9. The ring;- in the position 23 rests on a timer shoe 56 secured to one end of a timer bar 57 which is sup-- ported by pendent links 58 to rccipromuc horizontally. The spring 59 norniallv holds the timer shoein a position between wall 61 and G2 which define the lower cud of the chute mentioned above. When the shoe 5(3 is withdrawn by means presently to e dcscribed, the ring supported on said Hl'mo will drop to and rest upon the inclincd blocks (33, which position I term a loading station. The blocks are relatively adjustable to accoininodate rings of different dian'icters. l 1 will be observed that the ring at this stat ion is coincident with the path of the opening GT in the jaws to permit such rings to cuicr said opening 54: through the opening or in the wall 61 when the jaws are swung); past the loading station in a countcr-clomwise direction, as will be presently described. The timer rod 57, guided by the rollers so which are supported in boxes (ST having: rcmovable covers 68, is given a quick 1mm ment longitiulinally for withdrawine the shoe This is done at present by means of a lever 69 pivotally mounted at T on the frame and having; an end 72 adapted to be actuated by an adjustable tuppet T3 carried by arm 3'? of the bell-crank lover The free end of the lever (39 operate: between the faces 74: and 75 on the bar 5'7. This but urtuates, through the agency of chain connection 76, an ejector bar '7? pivoi'allv mounted lilll at 7 8 and equipped with an ejector shoe 7 9 adjustable by reason of the slot connection 81. It will be noted that the spring 59 is attached also to the ejector bar and serves to normally hold the latter in retracted position. The ejector will be given a vigorous CAD movement at the time the jaws reach the dotted line position shown in Fig. 2 for the purpose of laterally ejecting the ground ring from the opening 6%. The ejected ring may be caught by the rod 82 Oli a receiving rack of the kind described in application, Serial No. 357510, thus preventing breakage of the rings and collecting them in orderly fashion. \Vhen the jaws are in their most retracted or ejecting position the jaw 39 covers about two-thircs of the opening 65 and constitutes a battle or guide against which the ring at the loading station is urged by pressure of the bar 57 and the timer head 56. This head of channel shape, having a lower gliange 83. iThus when the jaws move forward toward the abrasive disks the ring at the loading station will be properly pressed into opening 64. Plate 84 limits outward movement ot' the ring, which will be instantly gripped by the jaws through the action of the cam 46.

After the ring has been entered between the abrasive disks 53 and 54C which are revolved in opposite directions at a high speed, disk 54 will be moved axially towarc disk 58 to grind both sides of the interposed ring. These disks are part of a grinding machine the construction of which I have not deemed necessary to illustrate, other than to show a means for moving the disk 54 axially in timed relation with the ring feeding mechanism. The disk arbor 85 is carried by a bracket 86 slidable on ways 87 and adapted to be reciprocated from the cam 88 by means oi sectional levers 89-91 and a segmental gear 92 meshing with rack 93. A micrometer stop, not shown, limits the feed movement of the disk 54.

The operation of my ii'nproveinents is as .iollowss-During each revolution of the shaft 2 1- which is constantly driven in a clockwise direction, viewing Fig. 2, a ring will be ground and ejected. The rings are stacked in the magazine and ted one at a time in the manner described above to the pre-loading station 23. The ring in the position shown in Fig. 2 is just one-halt through a complete cycle. The jaws have carried the ring between the grinding disks and are about to swing back away therefrom. This movement of the jaws is efiected by downward movement of the links 26, which simultaneously oscillates the bell-crank lever 27. This lever, after the jaw opening 64%- has passed the loading station, withdraws the timer bar and its shoe 56, allowing the ring on said shoe to drop to the loading station. Instantly after this action and when the jaws have reached the dotted line position shown in Fig. 2, the ejector will in a quick vigorous action, eject the ring from the jaws which are now separated by the cam d6. Then the link 26 moves upward it will carry the jaws toward the disks, causing the ring at the loading station to enter the jaws and be clamped thereby, and causing the next ring to be fed to the preloading station.

It will be manifest from the foregoing that the various co-operating instrumentalities operate in timed relation to uniformly and accurately grind rings or any similar ol jects, and that in view oi the automatic operation a relatively large number of rings may be ground in a given period as compared with the grinding of rings by hand.

It is believed that the above conveys a clear understanding of the principles and objects of my invention, and while I have illustrated and described but a single working embodiment thereof, it should be under stood that various changes might be made in the construction and arrangement without departing from the spirit and scope of the invention, as expressed in the appended claims, in which- I claim:

1. In a ring grinding machine, the combination of a pair of abrasive disks for grinding the sides of a ring, and an osci1- latory device for peripherally clamping a ring and feeding it between said disks by movement in one direction and for withdrawing the ring from the disks by movement in the opposite direction.

2. The combination with a air of abrasive disks for grinding the sides oi a ring, of apair of oscillatory jaws shaped for pcripherally clamping an interposed ring, and means for oscillating the jaws for carrying the ring between and away from said disks.

3. In a ring grinding machine, the combination of a pair of abrasive disks for grinding the sides of a ring, a pair of each having a semi-circular j aw face whereby to peripherally clamp a ring, and means for swinging said jaws back and forth to carry a clamped ring edgewise between and away from said disks.

4. In a machine for grinding piston rings, the combination of a pair of abrasive disks for grinding the sides of a piston ring, a pair of jaws shaped to conform to and clamp a ring substantially throughout its periphery, means for moving said jaws back and forth to carry a clamped ring edgewise between and away from said disks, and means tor axially ejecting the ground ring from the aws.

5. In a rin rinding machine, the com bination with a pair of abrasive disks, of

carrier of less width than a ring I said ring carrier into and out of space between the disks, means for closing the disks to grind the opposite sides of a ring while it is between the disks, and means for ejecting a ground ring from the carrier after the ring leaves the disks and for delivering a new ring into the carrier.

7. In a ring grinding machine, the combination with a pair of abrasive disks, a pairof aws pivotally mounted and adapt- .d for peripherally clamping an interposed ring, leaving the sides thereof projecting beyond the jaws, and means for moving the jaws about their pivot axis for carrying a ring between'and away from said disks.

8. In a machine tor grinding piston rings, the combination of a pair of abrasive disks, oscillatory jaws shaped to peripherally clamp a piston ring, means for oscillating said jaws to carry a clamped piston ring between said disks during movement of the jaws in one direction and to withdraw the ground ring during movement in the oppositedirection, and means for axially ejecting the ground ring from, and for axially inserting a new ring between said jaws during the interval of their movement away from and toward the disks.

9. In a machine of the character de scribed, the combination of jaws for peripherallygripping a ring and carrying it edgewise between a pair of spaced abrasive disks, means. for vertically supporting a ring in juxtaposition t0 the path of said jaws, and means for moving said ring laterally between I the jaws {while the same move toward said disks.

10; In a ring grinding machine, the combination with a pair of spaced abrasive disks,'osci.llatory meansfor carrying a ring ed 'e wise between and away from said'disks. meansfor effecting a relative movement between the disks to grind the sides of an interposed ring, and means for laterally jecting the ring from said first named means after the ring is removed from between the disks.

11." In. a machine for grinding piston rings, the combination of means for grind ing the sides of a piston ring, a pair of aws shaped to. peripherally clamp a piston ring and so mounted as to moveback and forth to carry a clamped ring edgewise between the grinding means and away therefrom, a magazine adapted for carrying a stack of rin s, means for removing a ring from the magazine and positioning it at a loading station in juxtaposition to the path of the awe, and means for moving the ring laterally from said loading station into the space between the jaws to be clamped thereby.

12. In a ring grinding machine, the combination with a pair of spaced ab 'asive disks, oscillatory jaws for carrying a ring edgewise between said disks for grinding opposite sides of a ring. and mechanism for ejecting a ring from the jaws andv inserting another there-between.

13. In a ring grinding machine, the combination with a pair of spaced abrasive disks, oscillatory jaws for carrying a ring edgewise between said di. (S for grinding opposite sides of the ring, and mechanism for ejecting a ring from the jaws near the end of their movement away from the disks and inserting another ring between the aws during the approach thcreot toward the disks.

14:. In a machine of the, character dcscribed,the combination of a magazine carrying a stack of rings. means for feeding the rings one at a time to a loading station, a ring carrier having an opening for the reception oi? a ring, means for operating said carrier to move a ring edgcwise bctween opposed abrasive wheels, thence to a position at which the ring is ejected, and thence to one in which said opening is in ignment w th the ring at saidv loading station, and means for moving this ring into said opening in the ring carrier.

1:). In a ring grinding machine, a. pair of jaws c mccntrically mounted and each having substantially a. semi-circular recess for the reception of a ring. means for moving the jaws about their pivot axis to carry a ring edgcwise between and away from a pair of abrasive wheels, and means i'or rclativcly moving said jaws about said axis to release the ring and clamp a new one.

16. In a ring grinding machine a comparatively relatively 'l'lat jaw "for clamping an interposed ring and carrying it between a pair oi. spaced aorasivc wheels, one of said jaws being relatively wide and constituting a guide against which the next ring to be ground is urged prior to its entrance between the jaws.

17. In a ring grinding machine a pair of relatively fiat jaws tor clamping an interposed ri ,3 for carrying the same between a pair ot'spare'tl aln'asive wheels, one of said iaws being relatively wide, means for moving the jaws between and away from said wheels. means for ejecting the ground ring from the jaws during the interval away from the wheels, said wide aw constituting during this interval a guide against which is urged the next ring to be gripped between the jaws.

18. In a ring grinding machine, the combination of means for carrying a ring in a vertical. plane edgewise between a pair of abrasive wiieels and away therefrom, means for ejecting the ring laterally from the first mentioned means, and a rod on which said ejected rings are received 19. In a ring grinding machine, the combination of. a magazine adapted to carry a vertical stack of rings, means for removing from said stack the lowermost ring and placing it in a vertical position substantially in alignment with the opening between a pair of opposed abrasive wheels, and means for moving this ring cdgewisebetween said wheels for grimling the opposite sides or" the ring.

20. in a ring grinding: machine, the combination of a magazine adapted to carry a stack of rings a pair of abrasive wheels adapted for grinding the sides of a ring, jaws adapted to peripl'ierally clamp a ring and to move past said loading station and between the abrasive wheels. and means -tor feeding a ring at said loading stationarially between said jaws.

21. In a ring grinding machine, the combination of a magazine adapted to carry a vertical stack of rings, a slide upon which said stack rests and having; an opening adapted to be positioned in alignment with the stack to receive the lowermost ring, means for moving said slide to remove said lowermost ring: from the stack, means for conveying said removed ring to a loading station, a pair of abrasive wheels, and a carrier for taking the ring from the loading station and moving it edgewise between said abrasive wheels to thereby grind the sides of the ring.

22. .ln a ring grinding machine of the character described, the combination of a vertical stack of rings, a i.'eci )roc-able slide upon which said stack rests and having an openii adapted to be moved into alignment with the stack to receive the lower most ring, means cai'ising said slide to remove said lowermost ring fronii the stack, a pair of: abrasive wheels, means for peripherally clamping a ring and moving it edgewise l etween said abrasive wheels, and means for causing; a ring removed from said stack to be positioned in operative relation to said clamping means in which to be clamped by the latter.

In a ring grinding machine, the combinntii'ni Of a magazine for a stack of rings, a iecipi'ecaiting member for removing from the V, the ring at one end thereof, means for Bltilng the sides of a ring, means for carrying said removed ring edgewise between tie grinding means, and mechanism for operating said ring removing means, including; a safety device for preventing feed of an end ring in the event of a ring jam.

24;. In a ring grinding machine, the combination of a pair of abrasive disks, oscillator jaws adapted to peripherally clamp a ring and to carry it edgewise between said disks by movement in one direction and withdraw it therefrom by movement in the opposite direction, means for ejecting the ground ring from the jaws approximately at their most remote position from the disks, and means for inserting a new ring between the jaws during their approach toward the disks.

VICTOR WINQUIST. 

